Exhibit 99.1
Plus Therapeutics Reports New Interim ReSPECT-GBM Phase 2 Trial Data at the Society for NeuroOncology Annual Meeting and will Host Key
Opinion Leader Webinar
Median overall survival (mOS) in 15 patients with recurrent glioblastoma (rGBM) from the Phase 2 study is 13
months, which is 63% better than current standard of care (bevacizumab monotherapy) of 8 months; 9 of the 15 patients remain alive
Median progression free survival (mPFS) is 11 months, compared to SOC at 4 months
Rhenium (186Re) Obisbemeda continues to demonstrate a favorable safety profile, despite
delivering up to 20x the dose of radiation (up to 740 Gy) typically delivered by external beam radiation therapy (EBRT) for rGBM patients (up to 35 Gy)
Imaging data presented by Andrew Brenner, MD, PhD is consistent with the efficacy signal of Rhenium (186Re) Obisbemeda in rGBM
Company to Host Virtual KOL Webinar to Discuss Data Today
at 10:00 am ET
AUSTIN, Texas, November 20, 2023 (GLOBE NEWSWIRE) Plus Therapeutics, Inc.
(Nasdaq: PSTV) (the Company), a clinical-stage pharmaceutical company developing targeted radiotherapeutics with advanced platform technologies for central nervous system cancers, today announced positive data from the
ongoing ReSPECT-GBM Phase 2 trial evaluating the Companys lead radiotherapeutic, rhenium (186Re) obisbemeda, for the treatment of recurrent glioblastoma (rGBM) at the Society for
NeuroOncology (SNO) 28th Annual Meeting held November 15-19, 2023 in Vancouver, Canada. The Company is hosting a virtual key opinion leader (KOL) webinar to
discuss the data today at 10:00 am ET. To register for the event, please click here.
GBM needs better treatment options, and we are highly
encouraged by the initial data from the NIH-supported ReSPECT-GBM Phase 2 trial of rhenium (186Re) obisbemeda in rGBM, said Marc H. Hedrick, M.D.,
M.B.A., President and Chief Executive Officer of Plus Therapeutics. We believe the data presented at SNO suggests that rhenium (186Re) obisbemeda confers a survival benefit over published
standard of care data and our own real world data assessments of propensity matched controls. Our 2024 focus will be onboarding additional clinical sites, completing Phase 2 enrollment, continuing the phase 1 trial to maximum tolerated dose, and
planning next steps for the program.
The interim ReSPECT-GBM Phase 2 data coupled with the novel imaging analyses reported at SNO
further strengthens the compelling therapeutic rationale for the use of rhenium (186Re) obisbemeda on malignant gliomas, said Andrew J. Brenner, M.D., Ph.D., Professor of Medicine, Neurology, and Neurosurgery at The University of
Texas Health Science Center at San Antonio and principal investigator of the ReSPECT-GBM clinical trial. The Phase 2 clinical outcomes thus far, show effects consistent with the group of patients in the Phase 1 dose escalation trial that
received both a therapeutic dose of radiation of greater than 100 Gy and tumor coverage of greater than 70%.